/**
 * jQuery.timers - Timer abstractions for jQuery
 * Written by Blair Mitchelmore (blair DOT mitchelmore AT gmail DOT com)
 * Licensed under the WTFPL (http://sam.zoy.org/wtfpl/).
 * Date: 2009/10/16
 *
 * @author Blair Mitchelmore
 * @version 1.2
 *
 **/

jQuery.fn.extend({
            everyTime: function(interval, label, fn, times) {
                return this.each(function() {
                    jQuery.timer.add(this, interval, label, fn, times);
                });
            },
            oneTime: function(interval, label, fn) {
                return this.each(function() {
                    jQuery.timer.add(this, interval, label, fn, 1);
                });
            },
            stopTime: function(label, fn) {
                return this.each(function() {
                    jQuery.timer.remove(this, label, fn);
                });
            }
        });

jQuery.extend({
            timer: {
                global: [],
                guid: 1,
                dataKey: "jQuery.timer",
                regex: /^([0-9]+(?:\.[0-9]*)?)\s*(.*s)?$/,
                powers: {
                    // Yeah this is major overkill...
                    'ms': 1,
                    'cs': 10,
                    'ds': 100,
                    's': 1000,
                    'das': 10000,
                    'hs': 100000,
                    'ks': 1000000
                },
                timeParse: function(value) {
                    if (value == undefined || value == null)
                        return null;
                    var result = this.regex.exec(jQuery.trim(value.toString()));
                    if (result[2]) {
                        var num = parseFloat(result[1]);
                        var mult = this.powers[result[2]] || 1;
                        return num * mult;
                    } else {
                        return value;
                    }
                },
                add: function(element, interval, label, fn, times) {
                    var counter = 0;

                    if (jQuery.isFunction(label)) {
                        if (!times)
                            times = fn;
                        fn = label;
                        label = interval;
                    }

                    interval = jQuery.timer.timeParse(interval);

                    if (typeof interval != 'number' || isNaN(interval) || interval < 0)
                        return;

                    if (typeof times != 'number' || isNaN(times) || times < 0)
                        times = 0;

                    times = times || 0;

                    var timers = jQuery.data(element, this.dataKey) || jQuery.data(element, this.dataKey, {});

                    if (!timers[label])
                        timers[label] = {};

                    fn.timerID = fn.timerID || this.guid++;

                    var handler = function() {
                        if ((++counter > times && times !== 0) || fn.call(element, counter) === false)
                            jQuery.timer.remove(element, label, fn);
                    };

                    handler.timerID = fn.timerID;

                    if (!timers[label][fn.timerID])
                        timers[label][fn.timerID] = window.setInterval(handler, interval);

                    this.global.push(element);

                },
                remove: function(element, label, fn) {
                    var timers = jQuery.data(element, this.dataKey), ret;

                    if (timers) {

                        if (!label) {
                            for (label in timers)
                                this.remove(element, label, fn);
                        } else if (timers[label]) {
                            if (fn) {
                                if (fn.timerID) {
                                    window.clearInterval(timers[label][fn.timerID]);
                                    delete timers[label][fn.timerID];
                                }
                            } else {
                                for (var fn in timers[label]) {
                                    window.clearInterval(timers[label][fn]);
                                    delete timers[label][fn];
                                }
                            }

                            for (ret in timers[label]) break;
                            if (!ret) {
                                ret = null;
                                delete timers[label];
                            }
                        }

                        for (ret in timers) break;
                        if (!ret)
                            jQuery.removeData(element, this.dataKey);
                    }
                }
            }
        });

jQuery(window).bind("unload", function() {
    jQuery.each(jQuery.timer.global, function(index, item) {
        jQuery.timer.remove(item);
    });
});